CN115353337A - Graphene paper composite filler conductive mortar and preparation method thereof - Google Patents
Graphene paper composite filler conductive mortar and preparation method thereof Download PDFInfo
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- CN115353337A CN115353337A CN202211028252.6A CN202211028252A CN115353337A CN 115353337 A CN115353337 A CN 115353337A CN 202211028252 A CN202211028252 A CN 202211028252A CN 115353337 A CN115353337 A CN 115353337A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/182—Graphene
- C01B32/184—Preparation
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/022—Carbon
- C04B14/026—Carbon of particular shape, e.g. nanotubes
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/10—Clay
- C04B14/106—Kaolin
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/08—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/90—Electrical properties
- C04B2111/94—Electrically conducting materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Nanotechnology (AREA)
- Inorganic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paper (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to the technical field of building materials, and particularly relates to composite graphene paper filler conductive mortar and a preparation method thereof. The conductive mortar comprises the following components in parts by weight: 160-200 parts of cement; 100-140 parts of fly ash; 600-800 parts of medium sand; 40-100 parts of graphene paper composite filler; 5-10 parts of redispersible latex powder; 5-20 parts of a water reducing agent; 1-3 parts of a retarder; 1-2 parts of a defoaming agent. According to the invention, the composite filler loaded with the graphene paper is prepared by reducing polyimide with laser, the obtained graphene conductive material has a simple preparation process and good conductivity, can be well lapped in a mortar system, the filler of the substrate is an alkaline porous material, and the filler is physically crushed and can be uniformly dispersed in the system, so that alkaline electrolyte consumed by anode reaction can be supplemented, the contact resistance between the main anode metal and the conductive cement mortar is reduced, the service time is long, and the environmental corrosion resistance is high.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to composite graphene paper filler conductive mortar and a preparation method thereof.
Background
In the long-term use process of the reinforced concrete, the reinforced passivation film layer is damaged under the action of chloride ion erosion or concrete layer carbonization, and then corrosion reaction occurs under the oxygen-containing condition, so that the structural safety of the reinforced concrete can be seriously affected by the structural deterioration of the reinforced concrete. Engineers use techniques such as steel bar coating, concrete coating, cathodic protection or rust inhibitor to prevent and treat corrosion of reinforced concrete structures, but cathodic protection techniques are identified by numerous authorities as the only effective corrosion control technique in chloride corrosion environments. The cathodic protection technology combines an external anode, a power supply and the steel bars to form an electric loop system, so that the steel bars are fully protected. In this technique, the additional anode material is usually an inert metal strip or mesh containing an inert metal oxide coating as the primary anode electrode, and mortar or conductive mortar is used to bury and fix the primary anode in the protected structure.
At present, most of anode conductive mortar materials are prepared by mixing carbon fiber, graphite powder, metal or metal oxide (sacrificial anode), coke particles and the like with cement slurry, and the resistivity range of the prepared mortar is 1.0-0.05 omega.m. However, such anode conductive mortar materials have limitations such as high cost and complicated preparation process.
CN114195452A discloses a conductive mortar, a conductive cement-based material with high conductivity and a preparation method thereof, and specifically discloses a raw material formula of the conductive mortar, which comprises the following components in percentage by mass: 36-41% of cement; 19-20% of water; 0.5 to 1 percent of water reducing agent; 0.5 to 3 percent of graphite; 0.1 to 0.5 percent of carbon fiber; 7-8% of silica fume; 30-32% of machine-made sand; 0.1-0.2% of carbon fiber dispersant and 0.01-0.08% of defoaming agent; wherein the particle size of the graphite is 800-1200 meshes. According to the technical scheme, the low-doping-amount carbon fibers are doped with the low-doping-amount graphite powder with the fine granularity and are used in cooperation with the use of the silica fume to improve the conductivity of the conductive mortar, but when the conductive mortar obtained by the technical scheme is applied to the corrosion field, the cement-based material in the conductive mortar is acidified and dissolved, the added conductive reinforcing component cannot supplement alkaline electrolyte consumed by anode reaction, the contact resistance of the main anode metal and the conductive cement mortar is improved, and an improvement space exists.
CN107651906A discloses a light conductive mortar material, which is characterized by comprising the following components in parts by weight: 100 parts of cement, 25-60 parts of modified agar gel loaded conductive porous lightweight aggregate and 30-45 parts of water, wherein the modified agar gel loaded conductive porous lightweight aggregate is prepared by the following method: (1) Adding agar powder into water, heating until the agar powder is completely dissolved, adding inorganic salt electrolyte, keeping the temperature of the solution above 90 ℃, continuously stirring for more than 30s, supplementing boiling water with the corresponding mass lost by evaporation, and preparing a modified agar aqueous solution; adding graphite powder into the modified agar aqueous solution, and forcibly stirring at a rotating speed of more than 60r/min to uniformly disperse the graphite powder in the modified agar aqueous solution; (2) Immersing the porous ceramsite in a modified agar water solution dispersed with graphite powder, keeping the temperature above 80 ℃, continuously stirring for more than 2min, taking out the porous ceramsite, air-cooling the agar on the surface of the porous ceramsite to solidify into gel, and stripping off the redundant agar gel. The technical scheme takes the conductive porous light aggregate which has low resistivity and is loaded with the functional modified agar as a raw material to replace the traditional quartz aggregate as a conductive reinforcing phase of the mortar, but the cost of the functional modified agar is very high compared with that of a building material, the manufacturing procedure is very complicated, and the further popularization and application of the functional modified agar are limited.
In summary, the prior art still lacks a conductive mortar which is simple to prepare, controllable in cost and good in conductive performance.
Disclosure of Invention
Aiming at the defects or improvement requirements of the prior art, the invention provides graphene paper composite filler conductive mortar, which aims to prepare a composite filler loaded with graphene paper by laser, wherein the filler is an alkaline porous material, and the filler is physically crushed and can be uniformly dispersed in a system, the graphene material has very strong hardness, can be well lapped in a mortar system to form a conductive path, so that the resistivity of a cement-based material is greatly reduced, and the conductivity is greatly improved. The detailed technical scheme of the invention is as follows.
In order to achieve the above purpose, according to one aspect of the present invention, there is provided a graphene paper composite filler conductive mortar, which is characterized by comprising the following components in parts by weight: 160-200 parts of cement; 100-140 parts of fly ash; 600-800 parts of medium sand; 40-100 parts of graphene paper composite filler; 5-10 parts of redispersible latex powder; 5-20 parts of a water reducing agent; 1-3 parts of retarder; 1-2 parts of a defoaming agent;
the graphene paper composite filler is prepared by the following method:
(1) Covering a plurality of layers of polyimide films by using the porous filler as a substrate;
(2) Reducing the polyimide paper by adopting laser induction to obtain graphene paper;
(3) And crushing the compound of the porous filler and the graphene paper to obtain the graphene paper composite filler.
Preferably, the laser induction is to scan the polyimide paper by a laser at a power of 50-200W, a scanning speed of 10-50mm/s and a printing resolution of 500-1000, so that the polyimide paper is completely reduced to black graphene paper.
Preferably, in the step (1), the mass ratio of the polyimide film to the porous filler is 1 (9-99).
Preferably, the laser is a carbon dioxide laser or a fiber laser.
Preferably, the porous filler is at least one of ceramsite, kaolin, clay and montmorillonite.
Preferably, the porous filler is kaolin.
Preferably, the particle size of the graphene paper composite filler is 150-200 meshes.
Preferably, the redispersible latex powder is an ethylene-vinyl acetate copolymer, and the particle size is 150-200 meshes.
Preferably, the defoaming agent is a silicone defoaming agent or a polyether defoaming agent.
According to another aspect of the present invention, there is provided a method for preparing a conductive mortar of graphene paper composite filler, comprising the following steps:
(1) Mixing and stirring cement, fly ash, graphene paper composite filler, redispersible latex powder, a retarder and a defoaming agent uniformly, and then adding and mixing medium sand uniformly to obtain a mixture;
(2) And (2) adding a water reducing agent into the mixture obtained in the step (1), adding water, and continuously stirring until the mixture is uniformly mixed to obtain the graphene paper composite filler conductive mortar.
The invention has the following beneficial effects:
(1) According to the invention, the composite filler loaded with the graphene paper is prepared by laser reduction of polyimide, and the obtained graphene conductive material has the advantages of simple preparation process, good conductivity and high rigidity, can be applied to concrete in a large scale, can achieve good lap joint in a mortar system, and greatly improves the conductivity of the prepared conductive mortar.
(2) The filler used as the substrate is an alkaline porous material, and the filler is physically crushed and can be uniformly dispersed in a system, so that alkaline electrolyte consumed by anode reaction can be supplemented, the contact resistance of the main anode metal and the conductive cement mortar is reduced, the service time is long, and the environmental corrosion resistance is high.
(3) After the filler is physically crushed, the filler can be matched with materials such as fly ash and medium sand in mortar, and the composite filler of graphene paper can form a conductive path in a mortar system, so that the resistivity of a cement-based material is greatly reduced.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Examples
Example 1
The conductive mortar of the embodiment comprises the following components in parts by weight: 200Kg of cement; 140Kg of fly ash; 800Kg of medium sand; 40kg of graphene paper composite filler; 10Kg of redispersible latex powder; 5Kg of water reducing agent; 1Kg of retarder; 1Kg of defoaming agent.
The graphene paper composite filler is prepared by the following method:
(1) 36kg of kaolin as a substrate, covered with 4kg of polyimide film;
(2) Scanning polyimide paper by a carbon dioxide laser at the power of 200W, the scanning speed of 10mm/s and the printing resolution of 1000, so that the polyimide paper is completely reduced to black graphene paper;
(3) And (3) crushing the compound of the kaolin and the graphene paper, wherein the particle size is 200 meshes, and thus the graphene paper composite filler can be obtained.
The preparation of the conductive mortar according to the parts by weight comprises the following steps:
(1) Mixing and stirring cement, fly ash, redispersible latex powder, graphene paper composite filler, a retarder and a defoaming agent uniformly, and then adding and mixing medium sand uniformly to obtain a mixture;
(2) And (2) adding a water reducing agent into the mixture obtained in the step (1), adding water, and continuously stirring until the mixture is uniformly mixed to obtain the conductive mortar.
Example 2
The present example is different from example 1 in that the porous filler is ceramsite. The details are as follows:
the graphene paper composite filler is prepared by the following method:
(1) Taking 36kg of ceramsite as a substrate, and covering 4kg of polyimide film;
(2) Scanning polyimide paper by a carbon dioxide laser at the power of 200W, the scanning speed of 10mm/s and the printing resolution of 1000, so that the polyimide paper is completely reduced to black graphene paper;
(3) And (3) crushing the compound of the kaolin and the graphene paper, wherein the particle size is 200 meshes, and thus the graphene paper composite filler can be obtained.
Example 3
This example differs from example 1 in that the porous filler is clay.
The graphene paper composite filler is prepared by the following method:
(1) Coating a polyimide film (4 kg) with clay (36 kg) as a base;
(2) Scanning polyimide paper by a carbon dioxide laser at the power of 200W, the scanning speed of 10mm/s and the printing resolution of 1000, so that the polyimide paper is completely reduced to black graphene paper;
(3) And (3) crushing the compound of the kaolin and the graphene paper, wherein the particle size is 200 meshes, and thus the graphene paper composite filler can be obtained.
Example 4
The present example is different from example 1 in the mass ratio of kaolin to polyimide.
The conductive mortar of the embodiment comprises the following components in parts by weight: 160Kg of cement; 100Kg of fly ash; 600Kg of medium sand; 100kg of graphene paper composite filler; 5Kg of redispersible latex powder; 20Kg of water reducing agent; 3Kg of retarder; 3Kg of defoaming agent.
The graphene paper composite filler is prepared by the following method:
(1) 99kg of kaolin as a substrate, covered with 1kg of polyimide film;
(2) Scanning polyimide paper by a carbon dioxide laser at the power of 200W, the scanning speed of 10mm/s and the printing resolution of 1000, so that the polyimide paper is completely reduced to black graphene paper;
(3) And (3) crushing the compound of the kaolin and the graphene paper, wherein the particle size is 200 meshes, and thus the graphene paper composite filler can be obtained.
The preparation of the conductive mortar according to the parts by weight comprises the following steps:
(1) Mixing and stirring cement, fly ash, redispersible latex powder, graphene paper composite filler, a retarder and a defoaming agent uniformly, and then adding and mixing medium sand uniformly to obtain a mixture;
(2) And (2) adding a water reducing agent into the mixture obtained in the step (1), adding water, and continuously stirring until the mixture is uniformly mixed to obtain the conductive mortar.
Comparative example 1
This example is different from example 1 in that no graphene paper composite filler was added.
The conductive mortar of the embodiment comprises the following components in parts by weight: 200Kg of cement; 140Kg of fly ash; 800Kg of medium sand; 10Kg of redispersible latex powder; 5Kg of water reducing agent; 1Kg of retarder; 1Kg of defoaming agent.
Comparative example 2
This example differs from example 1 in that kaolin was added and no graphene paper was added.
The conductive mortar of the embodiment comprises the following components in parts by weight: 200Kg of cement; 140Kg of fly ash; 800Kg of medium sand; 40kg of kaolin; 10Kg of redispersible latex powder; 5Kg of water reducing agent; 1Kg of retarder; 1Kg of defoaming agent.
Comparative example 3
This example differs from example 1 in that graphene paper was added, and no kaolin was added.
The conductive mortar of the embodiment comprises the following components in parts by weight: 200Kg of cement; 140Kg of fly ash; 800Kg of medium sand; 40kg of graphene paper; 10Kg of redispersible latex powder; 5Kg of water reducing agent; 1Kg of retarder; 1Kg of defoaming agent.
The graphene paper is prepared by the following method: the polyimide paper was scanned with a carbon dioxide laser at 200W power, a scanning speed of 10mm/s and a print resolution of 1000, so that the polyimide paper was entirely reduced to black graphene paper.
Comparative example 4
This example differs from example 1 in that a mixture of kaolin and graphite was added.
The conductive mortar of the embodiment comprises the following components in parts by weight: 200Kg of cement; 140Kg of fly ash; 800Kg of medium sand; 36Kg of kaolin, 4Kg of graphite powder; 10Kg of redispersible latex powder; 5Kg of water reducing agent; 1Kg of retarder; 1Kg of defoaming agent.
Test examples
1. Resistivity testing
The electrical resistivity of the conductive mortars of examples 1 to 4 and comparative examples 1 to 4 was measured by the four-electrode method.
2. And (5) testing the compressive strength.
The mortars prepared in examples 1 to 5 and comparative examples 1 to 2 were tested for compressive strength, flexural strength and adhesive strength, according to GB/T17671-1999 "Cement mortar Strength test method", the age of the strength test was 7 days and 28 days, respectively, the test pieces were 40mm x 160mm, and the adhesive strength was tested according to JC/T907-2002 "concrete interface treating agent".
TABLE 1 test results of examples 1-4 and comparative examples 1-4
As can be seen from table 1, although the mechanical properties of kaolin are not improved very much, the conductivity of kaolin is improved the most and is the most stable, which indicates that the alkaline ability of the matrix is much supported to improve the corrosion resistance. Secondly, this application uses laser printing graphite alkene paper, can prepare fast, and the raw materials are cheap, moreover because contain graphite alkene material, compare graphite and add and have stronger electric conductivity. Thirdly, after the alkaline substrate and the graphene paper are compounded, the filler is physically crushed and can be matched with materials such as fly ash and medium sand in the mortar, so that the mechanical property of the mortar is not influenced, a conductive path can be formed in a mortar system, and the resistivity of the cement-based material is greatly reduced.
It will be understood by those skilled in the art that the foregoing is only an exemplary embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, since various modifications, substitutions and improvements within the spirit and scope of the invention are possible and within the scope of the appended claims.
Claims (10)
1. The graphene paper composite filler conductive mortar is characterized by comprising the following components in parts by weight: 160-200 parts of cement; 100-140 parts of fly ash; 600-800 parts of medium sand; 40-100 parts of graphene paper composite filler; 5-10 parts of redispersible latex powder; 5-20 parts of a water reducing agent; 1-3 parts of retarder; 1-2 parts of a defoaming agent;
the graphene paper composite filler is prepared by the following method:
(1) Covering a plurality of layers of polyimide films by using the porous filler as a substrate;
(2) Reducing polyimide paper by adopting laser induction to obtain graphene paper;
(3) And crushing the compound of the porous filler and the graphene paper to obtain the graphene paper composite filler.
2. The graphene paper composite filled conductive mortar according to claim 1, wherein the laser induction is specifically to scan a polyimide paper with a laser at a power of 50-200W, a scanning speed of 10-50mm/s and a printing resolution of 500-1000, so that the polyimide paper is completely reduced to black graphene paper.
3. The graphene paper composite filler conductive mortar according to claim 2, wherein the mass ratio of the polyimide film to the porous filler is 1 (9-99).
4. The graphene paper composite filled conductive mortar according to claim 2, wherein the laser is a carbon dioxide laser or a fiber laser.
5. The graphene paper composite filler conductive mortar according to claim 2, wherein the porous filler is at least one of ceramsite, kaolin, clay and montmorillonite.
6. The graphene-paper composite-filler conductive mortar according to claim 2, wherein the porous filler is kaolin.
7. The graphene paper composite filler conductive mortar according to claim 2, wherein the particle size of the graphene paper composite filler is 150-200 meshes.
8. The graphene paper composite filled conductive mortar according to claim 1, wherein the redispersible latex powder is an ethylene-vinyl acetate copolymer, and the particle size is 150-200 mesh.
9. The graphene paper composite filler conductive mortar according to claim 1, wherein the defoaming agent is a silicone defoaming agent or a polyether defoaming agent.
10. The preparation method of the conductive mortar of graphene paper composite filler according to any one of claims 1 to 9, characterized by comprising the following steps:
(1) Mixing and stirring cement, fly ash, graphene paper composite filler, redispersible latex powder, a retarder and a defoaming agent uniformly, and then adding and mixing medium sand uniformly to obtain a mixture;
(2) And (2) adding a water reducing agent into the mixture obtained in the step (1), adding water, and continuously stirring until the mixture is uniformly mixed, so as to obtain the graphene paper composite filler conductive mortar.
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